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xrays. History Of Xrays Wilhelm Conrad Roentgen, a professor at Wuerzburg University in Germany from 1845 until 1923, made the discovery of X-rays in 1895. Roentgen noticed crystals glowing fluorescently on a table close to his cathode-ray tube as he was working on it in his lab. The glass envelope (bulb) that housed the positive and negative electrodes that made up the tube Roentgen used to make his measurements was what made up the device. A high voltage was applied after the tube's air was evacuated, and the tube produced a fluorescent light. Under a black light, fluorescent colours glow and are bright, vibrant colours. When Roentgen used thick black paper to conceal the tube, he saw a green fluorescent light coming from something a few feet distant. He deduced that the tube was emitting a novel kind of radiation. The phosphorescent materials in the room could be excited by this light, which could penetrate the thick paper covering. He discovered that the new ray cou...

Radioactivity   Discovery of Radioactivity   It took several years for the discovery of radioactivity to occur, starting with Wilhelm Conrad Roentgen's discovery of x-rays in 1895 and continuing with figures like Henri Becquerel and the Curie family. X-rays and radioactive materials have a wide range of uses in both industry and medicine. Nuclear reactors and isotope-infused saline solutions are only two examples of the many applications for radioactive material. With the help of these technologies, we are able to use enormous quantities of energy and study biological processes in ways that weren't even imaginable a century ago. Introduction What exactly is meant by radioactive? The confusing response you will find if you check up the definition in the dictionary is: Adjective: radioactive means emitting or having to do with ionising radiation or particles. What exactly are ionising radiation or particles, given this definition? What is meant specifically by emissi...